| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package org.apache.impala.planner; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.impala.analysis.BinaryPredicate; |
| import org.apache.impala.analysis.Expr; |
| import org.apache.impala.thrift.TDataSink; |
| import org.apache.impala.thrift.TDataSinkType; |
| import org.apache.impala.thrift.TExplainLevel; |
| import org.apache.impala.thrift.TJoinBuildSink; |
| import org.apache.impala.thrift.TQueryOptions; |
| import com.google.common.base.Preconditions; |
| |
| import static org.apache.impala.analysis.ToSqlOptions.DEFAULT; |
| |
| /** |
| * Sink to materialize the build side of a join. |
| */ |
| public class JoinBuildSink extends DataSink { |
| // id of join's build-side table assigned during planning |
| private final JoinTableId joinTableId_; |
| |
| private final List<Expr> buildExprs_ = new ArrayList<>(); |
| |
| /** |
| * Creates sink for build side of 'joinNode' (extracts buildExprs_ from joinNode). |
| */ |
| public JoinBuildSink(JoinTableId joinTableId, JoinNode joinNode) { |
| Preconditions.checkState(joinTableId.isValid()); |
| joinTableId_ = joinTableId; |
| Preconditions.checkNotNull(joinNode); |
| Preconditions.checkState(joinNode instanceof JoinNode); |
| if (!(joinNode instanceof HashJoinNode)) return; |
| for (Expr eqJoinConjunct: joinNode.getEqJoinConjuncts()) { |
| BinaryPredicate p = (BinaryPredicate) eqJoinConjunct; |
| // by convention the build exprs are the rhs of the join conjuncts |
| buildExprs_.add(p.getChild(1).clone()); |
| } |
| } |
| |
| public JoinTableId getJoinTableId() { return joinTableId_; } |
| |
| @Override |
| protected void toThriftImpl(TDataSink tsink) { |
| TJoinBuildSink tBuildSink = new TJoinBuildSink(); |
| tBuildSink.setJoin_table_id(joinTableId_.asInt()); |
| for (Expr buildExpr: buildExprs_) { |
| tBuildSink.addToBuild_exprs(buildExpr.treeToThrift()); |
| } |
| tsink.setJoin_build_sink(tBuildSink); |
| } |
| |
| @Override |
| protected TDataSinkType getSinkType() { |
| return TDataSinkType.JOIN_BUILD_SINK; |
| } |
| |
| @Override |
| public void appendSinkExplainString(String prefix, String detailPrefix, |
| TQueryOptions queryOptions, TExplainLevel detailLevel, StringBuilder output) { |
| output.append(String.format("%s%s\n", prefix, "JOIN BUILD")); |
| if (detailLevel.ordinal() > TExplainLevel.MINIMAL.ordinal()) { |
| output.append( |
| detailPrefix + "join-table-id=" + joinTableId_.toString() |
| + " plan-id=" + fragment_.getPlanId().toString() |
| + " cohort-id=" + fragment_.getCohortId().toString() + "\n"); |
| if (!buildExprs_.isEmpty()) { |
| output.append(detailPrefix + "build expressions: ") |
| .append(Expr.toSql(buildExprs_, DEFAULT) + "\n"); |
| } |
| } |
| } |
| |
| @Override |
| protected String getLabel() { |
| return "JOIN BUILD"; |
| } |
| |
| @Override |
| public void computeResourceProfile(TQueryOptions queryOptions) { |
| // The memory consumption is counted against the join PlanNode. |
| resourceProfile_ = ResourceProfile.noReservation(0); |
| } |
| |
| @Override |
| public void collectExprs(List<Expr> exprs) { |
| exprs.addAll(buildExprs_); |
| } |
| } |